RobUSMC

Raytrace Speed

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Is there a listing that will show each fixture / symbol in a plan that you can view to see what item or items are slowing the raytrace down?  I have plans of  multiple area that will raytrace in half the time or more than a plan where its a single kitchen only.  It must be a symbol or a texture that I have saved in my library over the years and using in a particular plan. This would allow me to change it with something else with less faces...  thanks

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No there is nothing like that available in the software at this time.

 

In my experience, lights are the biggest hog of resources when it comes to ray trace time.

But it is possible to have a high surface count object that slows things down. These would generally be imported from 3rd parties though because our content team keeps all of our symbols at less than 10,000 surfaces a piece.

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Kirk - is CA considering any sort of render farm in the future for clients?....perhaps part of an SSA package?

Also, does the CA viewer allow Raytrace? I was thinking about getting a dedicated rendering computer for our office but was thinking about the need for additional lic.

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It's been discussed. But I'm not sure how close we are to consider beginning to implement that type of solution. I'm sure that as more ArchViz artists begin to use our software the demand may warrant the man hours to develop such a service but for now, it's just a 'would be nice someday' on our radar as far as I know.

 

Someone from our development team may know more.

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you think 300,000 faces is high for a full kitchen with your typical applainces

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It's not huge, but definitely higher than the average scene.

Are their any objects behind the camera that won't show up in reflective surfaces that you can hide or delete temporarily?

 

Also, isolating just that room into it's own plan can help too.

 

And of course, keep an eye on the number of light sources. Only use what is absolutely necessary to portray what you want to show. I've seen minutes added to a scene just from adding one light source.

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Is there a way to isolate the one scene in raytrace and it ignores all others versus having to delete or turn off?

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Is there a way to isolate the one scene in raytrace and it ignores all others versus having to delete or turn off?

 

Unfortunately, not. That would be nice to have as an option, but since everything in the plan plays a role in the results, everything is included.

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What I usually do is use 'File> Save as...' to create a separate copy of the plan. Then delete everything around the room I want to ray trace.

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I just took the same plan and made a copy. The actual plan has 7 can lights 4 under cabinet lights and 11 pendants.  In ray tracing this plan take just under 4 mins to complete pass #1. Where as, by taking the same plan and deleting all the pendants only (everything else remains the same) pass #1 completes at 1:25 mins.  Is there a better way to get a decent raytrace with the fixtures we will be using or bottom line if you don't want a dark room and have lighting its going to take three to four times as long to render.

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Rob - Turn off all the fixtures.  Increase the ambient light in the model.  Place a few point lights in the room at about 5-6' off the floor.

Make the glass on the fixtures highly emissive, maybe 80-90 so they LOOK like the are on.  Also, if there are windows set the sun to shine through

and use the north pointer to rotate the sun angle.  Usually 8-9 AM or 6-7 PM will get you a low sun to come through the windows.

See if that helps.

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This is just what I've come across in different Architectural Visualization topics, but as a rule of thumb, if you are creating a day time interior scene, you don't want to turn on the lights. This makes the scene seem out of place for most people because if there is sun shining through the windows you won't usually have every light in the room turned on.

 

That being said, I generally turn off small lights such as cabinet lights and usually just go with the one main light fixture, such as the pendants or the cans but not all of them. If possible I avoid turning any fixtures on in a day time scene. Instead I boost the direct sunlight intensity in my ray trace settings and try to angle the sun into the room through the windows as much as possible.

 

Then use "Studio" lights to brighten up the scene. What I like to do is add a point or spot lamp directly behind the camera.

Under light data I turn off 'Casts Shadows'.

 

Then play with the position and intensity so it doesn't mess with the scene but actually brightens it up.

 

This way you only have 2 light sources that are actually present, the sun, and the studio light behind the camera.

You get nicer, softer lighting without the added time required to render all the light fixtures.

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Thanks Dennis and Kirk.  Ill try both.

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Just tried some of these and now im getting 20-25 passes in 80 secs

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That's great! How does the scene look in your opinion? Are you happy with the results?

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There is one light symbol that slows my rendering down to a crawl. it's one pendant light that I like putting on my kitchen scene...I forgot the name...

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There is one light symbol that slows my rendering down to a crawl. it's one pendant light that I like putting on my kitchen scene...I forgot the name...

 

How many light sources does it have? And what's it's surface count?

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There is one light symbol that slows my rendering down to a crawl. it's one pendant light that I like putting on my kitchen scene...I forgot the name...

 

Open the DBX on the pendant light, it is probably set to a point light, change to spot light and your problem should be resolved.

 

Graham

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It's not the about the point or spot light. it's about the geometry, it's the symbol.

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Is there a way to isolate the one scene in raytrace and it ignores all others versus having to delete or turn off?

 

Yes - sort of.  Do a saveas on your model and delete freely outside the area that will be in view.   It's not "vs delete", but If you're doing large raytraces it can be well worth the few minutes it takes. 

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It's not the about the point or spot light. it's about the geometry, it's the symbol.

 

What is the fixtures name? I will try it out.

 

Graham

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This Raytrace took over 50 min. and had only done 6 passes.  I would agree with Kirk that if I had saved the drawing and only took a Raytrace of the area I wanted it would have been much faster.  That being said it is a waste of time either way.  I feel like I have a graphics card that should make lightspeed of this but I now feel that I need a new graphics card to keep up.

post-64-0-15972700-1447952532_thumb.jpg

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This Raytrace took over 50 min. and had only done 6 passes.  I would agree with Kirk that if I had saved the drawing and only took a Raytrace of the area I wanted it would have been much faster.  That being said it is a waste of time either way.  I feel like I have a graphics card that should make lightspeed of this but I now feel that I need a new graphics card to keep up.

 

Well, unfortunately the ray tracer does not support rendering on the graphics card at this point. It's all done on the processor. The faster the processor the faster the render speed. But playing with lighting and setup can help as well.

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Will this justifiably improve Raytracing? 

OK.  So, I currently have a Macbook Pro with a Quad Core 2.8 Ghz Processor.  I was thinking about purchasing a new Mac Pro in one of the following configurations:

 

3.5GHz 6-core with 12MB of L3 cache -or-

3.0GHz 8-core with 25MB of L3 cache -or-
2.7GHz 12-core with 30MB of L3 cache
 
A few questions:
  1. Would there be a considerably noticeable improvement in Raytrace rendering speeds over my current Quad Core Macbook Pro?  Is it quantifiable?  +25%? +50%, faster etc?
  2. Which configuration is the better choice for Raytracing? Faster speed and fewer cores or more cores and slower speeds?  or perhaps the middle of the road?
  3. Anyone running a Mac Pro currently that can comment on this?

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